Base 12 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 83: | \[{12^{83}-1\over11}\] | 167 × 997 × 1993 × 22079 × 557889481 × 35238620437<11> × 2731547200091<13> × 10052468384786123<17> × 8580328460037248736936629989<28> |